Post workers (5)

I believe the answer is:

staff

I believe this is a double definition.

'post' is the first definition.
(I've seen this before)

'workers' is the second definition.
(members of staff)

(Other definitions for staff that I've seen before include "Rod - workforce" , "Take a rod to the personnel?" , "Administrators etc - stick" , "Crew" , "team?" .)

I've seen this clue in The Telegraph.

Want a hint initially instead of a full solution? Install my app